Thank you for the comment.
The working group agrees that there are use case where such a function would be useful. The functions UUID(), which generates a URN UUID IRI, and StrUUID(), which generates the string format for a UUID, have been added to the SPARQL function library.
On behalf of SPARQL-WG
> One useful feature I would like to see in SPARQL is a string function > that returns a 128 bit UUID (as defined by ). This could be used > to construct IRIs  or string literals. In particular, this would > assist greatly in minting new resources in a query for entities that > may not otherwise lend themselves to a good naming scheme.